The 15th Finance Commission was formed in November 2017 to define financial relations between central and state governments in India and recommend a formula for sharing tax revenue for five years. It examined fiscal issues and problems and made recommendations. The commission decreased the share of taxes devolved to states from 42% to 41% for 2020-21, with 1% allocated to newly formed Union Territories. The commission's revenue sharing formula updated criteria from the 14th Finance Commission, such as increasing the population weight from 10% to 15% and adding new criteria for forest ecology, demographic performance, and tax efficiency.